US9653767B2ActiveUtilityA1
Antenna and printed-circuit board using waveguide structure
Est. expiryFeb 24, 2029(~2.6 yrs left)· nominal 20-yr term from priority
H10W 90/724H10W 70/63H01Q 15/006H01P 3/003H01P 1/2005H03H 7/46H01Q 13/08H01Q 15/008
70
PatentIndex Score
2
Cited by
71
References
20
Claims
Abstract
A waveguide structure including a plurality of unit structures, each of which at least includes a first conductive plane and a second conductive plane, which are arranged to partially face with each other, a plurality of transmission lines with one ends being open ends, which are disposed in a plane, positioned opposite to the second conductive plane, in a layer different from the first conductive plane and the second conductive plane, and at least one conductive via, which electrically connect between the first conductive plane and other ends of the transmission lines.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A waveguide structure, comprising:
a first conductive plane and a second conductive plane, which are positioned opposite to each other, the second conductive plane being electrically isolated from the first conductive plane; and
a plurality of unit structures,
wherein each of the plurality of unit structures at least includes:
a plurality of transmission lines each delimited by an open end and an opposite end, wherein at least a part of the plurality of transmission lines is disposed in a same plane facing with the second conductive plane different than the first conductive plane and the second conductive plane; and
at least one conductive via, which electrically connects between the first conductive plane and the opposite end of each transmission line,
wherein the plurality of transmission lines include at least two transmission lines having different lengths.
2. The waveguide structure according to claim 1 , wherein the plurality of transmission lines include the at least two transmission lines disposed in the same plane.
3. The waveguide structure according to claim 1 , wherein the same plane is disposed opposite to the first conductive plane with respect to the second conductive plane.
4. The waveguide structure according to claim 1 , wherein the same plane is interposed between the first conductive plane and the second conductive plane.
5. The waveguide structure according to claim 1 , wherein the plurality of transmission lines include at least one transmission line which is disposed opposite to the first conductive plane with respect to the second conductive plane, and the plurality of transmission lines further include at least another transmission line which is interposed between the first conductive plane and the second conductive plane.
6. The waveguide structure according to claim 1 , wherein a distance between the second conductive plane and the plurality of transmission lines is less than a distance between the first conductive plane and the plurality of transmission lines.
7. A printed circuit board including the waveguide structure according to claim 1 .
8. An electronic device including the waveguide structure according to claim 1 .
9. The waveguide structure according to claim 1 , wherein the other ends of the transmission lines are electrically connected to a corresponding pad which is located in the plane with the transmission lines.
10. The waveguide structure according to claim 9 , wherein the pad is electrically connected to the first conductive plane through the at least one conductive via.
11. The waveguide structure according to claim 1 , further comprising a clearance formed in a proximity to the conductive via, thus electrically isolating the conductive via from the second conductive plane.
12. The waveguide structure according to claim 1 , wherein the plurality of transmission lines include the at least two transmission lines which have different lengths in each of the unit structures.
13. The waveguide structure according to claim 1 , wherein, in a plan view, adjacent transmission lines of the plurality of transmission lines do not overlap with each other.
14. The waveguide structure according to claim 1 , wherein the plurality of transmission lines are configured to operate as a stub.
15. The waveguide structure according to claim 14 , wherein the plurality of transmission lines are laid opposite to the second conductive plane with an entire length thereof.
16. The waveguide structure according to claim 14 , wherein the plurality of transmission lines are each laid opposite to the second conductive plane with an entire length thereof.
17. The waveguide structure according to claim 1 , wherein the plurality of transmission lines are laid opposite to the first conductive plane and the second conductive plane.
18. The waveguide structure according to claim 1 , wherein the plurality of transmission lines are each laid opposite to the first conductive plane and second conductive plane.
19. The waveguide structure according to claim 1 , wherein the at least two transmission lines having different lengths provide an electromagnetic bandgap at multiple frequencies.
20. The waveguide structure according to claim 1 , wherein the second conductive plane undergoes a resonance at a frequency f satisfying an inequality of Im(Y(f) ≧0 to emit an electromagnetic wave into air in accordance with an equation of:
Y
(
f
)
=
1
ⅈ
(
2
π
fL
via
-
Z
0
tan
(
2
π
f
ɛ
eff
c
0
d
)
)
+
ⅈ
2
π
fC
PPW
wherein:
f: frequency;
L via : inductance of the conductor via;
Cppw: capacitance formed between the first conductive plane and the second conductive plane in each unit cell;
Z 0 : characteristic impedance of the transmission line;
d: length of the transmission line;
ε eff : effective dielectric constant of the transmission line; and
c 0 : speed of light in vacuum.Cited by (0)
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